Section 5
Changing Settings
25
FT702LT/D Flat Front Wind Sensor Manual
5 CHANGING SETTINGS
The FT702LT/D is fitted with a 2 wire serial interface. This interface is provided to allow the user to change the
internal settings of the FT702LT/D and to perform diagnostic testing. This interface should only be used for
configuration and test purposes. This interface does not include the same level of lightning and EMC protection
as the 4-20mA outputs and power supply connections. It should
not
be permanently connected to the data
acquisitions system.
The interface should only be accessed using the FT055 cable and FT702LT/D Set-Up and Test Program
provided with the FT702LT/D Evaluation Pack (see Section
also). Figure 22 lists the settings that can be
modified.
Function
Factory Default Setting
Range
Description
Heater Set Point
30
°
C
0-55
°
C & Off
^
See Section 2.3
Heater Current Limit
4A
0.1-6.0A*
#
See Section 2.3
Wind Velocity Filter
On
On or Off
See Section 2.2.1
Datum Offset
0
°
±180
°
See Section 2.2.4
Datum Current
12mA
4mA or 12mA
See Section 0
Loop Error Signal
1.4mA
1.4-3.9 mA*
Figure 22: FT702LT/D Configurable Settings
Notes:
^ Set Point above 44
0
C only available from build version 22
* Setting only adjustable from build version 22
# Greater than 4A only available from build version 22
In addition to being able to change these settings the FT702LT/D Set-Up and Test Program is also used to run
the current loop auto-increment test function (Section 5.5). It is also possible to generate a report listing the
sensor’s details and its settings (Section 0).
5.1 Installing the Configuration Program
The FT702LT/D Set-Up and Test Program can be installed on any PC running a Windows operating system. To
install the FT702LT/D Set-Up and Test Program;
1. Insert the FT Technologies CD provided as part of the FT702LT/D Evaluation Pack into CD drive.
2. Browse to the FT702LT/D Set Up and Test Program installer on the CD and double click on the setup
icon.
3.
Select a location to install the program to on the PC’s local hard drive. Once installed a shortcut icon
will be automatically placed on the desktop.
Figure 23: Program Icon on Desktop
5.2 Configuring the FT702LT/D
The FT702LT/D can be connected to any PC with a USB serial port. Connect the wind sensor to the PC using
the FT055 evaluation cable.
Then
switch on the power supply.
Then
run the FT702LT/D Set-Up and Test
Program.
